Multibeam light machine



Jan. 15, 1935. M. H. LIVINGSTON 1,987,744

MULTIBEAM LIGHT MACHINE Filed April 24, 1930 13 Sheets-Sheet l ill? mnlllllil'ln nyx Egyrok.

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MULTIBEAM LIGHT MACHINE Filed April 24, 1950 15 Sheets-Sheet 5 11W 'ENTOR.

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1935. M. H. LIVINGSTON MULTIBEAM LIGHT MACHINE Filed April 24, 1930 13 Sheets-Sheet 6 Ill I INVENTOR. Waga A TTOR NE Y.

Jan. 15, 1935. M. H. LIVINGSTON MULTIBEAM LIGHT MACHINE Filed April 24, 1930 15 Sheets-Sheet 7 A TTORNE Y.

Jan. 15, 1935. M. H. LIVINGSTON MULTIBEAM LIGHT MACHINE Filed April 24, 1930 15 Sheets-Sheet 8 A TTORXEY.

Jan. 15, 1935. M. H. LIVINGSTON MULTIBEAM LIGHT MACHINE Filed April 24, 1950 13 SheetsSheet 9 lNLjE-YTOR cce/ZZ Zu ATTORNEY.

1935- M. H. LIVINGSTON MULTIBEAM LIGHT MACHINE Filed April 24, 1930 13 Sheets-Sheet 10 I INVENTORY ATTORNEY.

Jan. 15, 1935. M. H. LIVINGSTON MULTIBEAM LIGHT MACHINE.

13 Sheets-Sheet 11 Filed April 24, 1930 Jan. 15, 1935. M. H. LIVINGSTON MULTIBEAM LIGHT MACHINE Filed April 24, 1930 13 Sheets-Sheet l2 III! I. a:

INVENTOR.

BY c lwmd A TTORNE Y.

Jan. 15, 1935.

M. H. LIVINGSTON 1,987,744

MULTIBEAM LIGHT MACHINE Filed April 24, 1930 15 Sheets-Sheet l3 .Dw enZbfi' Mi 9 Patented Jan. 15, 1935 MUL'I'IBEAM LIGHT MACHINE Maurice H. Livingston, Chicago, Ill. Application April 24, 1930, Serial No. 446,939

9 Claims.

This invention relates to improvements in machines for throwing beams of light and has special reference to means and methods for simultaneously throwing a number of beams of light in different directions or the same direction.

l"he object of the invention is to provide a machine of the character mentioned for use more especially on aeroplane landing fields for assisting in the taking off and the landing of planes.

The machine is capable of ready adjustment to produce any size beam from Pencil to very wide, with or without color, and, among other uses, for use in penetrating fog, smoke, rain or snow.

While the machine is especially designed and adapted for such use, it will be found as useful for many other purposes connected with illumination, such, for instance, among others, as general flood lighting at wide angles, in any weather and any desired color; for use.in throwing an advertisement upon any suitable surface, such as walls, clouds, etc.; for sending messages from ground to plane by light flashes; or, in fact, wherever powerful lighting is desired, this machine is capable of use.

There are many important features of the invention, which will become clear hereinafter, among others, the machine is built and adapted to render it easy to quickly change from a pencil light to a flood light effect; to change from a directly projected beam to one or more deflected beams adapted to be easily manipulated to follow a plane in flight; horizontally and perpendicularly; to add one or more deflected beams to a directly projected beam, the deflected beams being capable of independent manipulation; to provide protective ground illumination about the machine whether or not the light beams are being thrown out; to provide means for concentrating a maximum quantity of the light produced by the lamp in a single beam to the end that the beam shall be of maximum intensity; to provide means for diverting the reflected beam out of the axis of the direct beam for the purpose of providing two or multiple beams from a single light source or lamp; to provide simple means of ventilating not only the lamp housing, but also the lens and reflector mountings, for protecting the same from overheating; to provide means in some instances of regulating the ventilation and hence the cooling of lens mountings to guard against their cracking in use; to provide simple means for producing a thin flat beam for special uses, such as ground lighting for sports, etc. Many other features of importance will become clear from the following description taken in conjunction with the appended claims, and also with the accompanying drawings forming part of this specification and in which:-

Fig. 1 is a side elevation of the multi-beam machine, the lamp housing and attached parts being shown in full lines in one position and in dotted lines in a second position;

Fig. 1 is a detail vertical section of the lamp housing door on the line l -l of Fig. l

Fig. 2 is a front view of the machine;

Fig. 3 is a rear view of the machine;

Fig. 4 is a plan section of the machine on the line 4-4 of Fig. 1;

Fig. 5 is a fragmentary,'vertical section of the machine on the line 5-5 of Fig. 4;

Fig. 5 is a fragmentary section on the line 5'-5* of Fig. 5;

Fig. 5 is a top plan view of an oil plate upon which the lamp housing rotates;

Fig. 6 is a perspective view of an extension tube for certain light beams;

Fig. 7 is a perspective view of a lens holder removed from the machine;

Fig. 8 is a longitudinal, sectional view on the line 8-8 of Fig. 7;

Fig. 9 is a central, sectional view of a corrugated lens;

Fig. 10 is a side view of a spring ring for holding a lens in place;

Fig. 11 is a front elevation of the front or objective lens support;

Fig. 12 is a fragmentary sectional view on the line 12-12 of Fig. 1, showing latch for door of lamp housing;

Fig. 13 is a detail section on the line 13-13 of Fig. 5, showing lamp holder and socket;

Fig. 14 is a detail section on the line 14-14 of Fig. 5, showing the reflector holder and support;

Fig. 15 is a vertical sectional view of the reflector and holder on the line 15-15 of Fig. 14;

Fig. 16 is a horizontal sectional view on the line 16-16 of Fig. 14;

Fig. 17 is a fragmentary side view of the machine showing an alternate elevating mechanism;

Fig. 18 is a fragmentary vertical sectional view on the line 18-18 of Fig. 17;

Fig. 19 is a detail vertical section on the line 19-19 of Fig. 1 and showing an enlarged front view of the slide holder;

Fig. 20 is a vertical sectional view on the line 20-20 of Fig. 19;

Fig. 21 is a perspective view of a device for producing a thin flat beam of light;

on the line 23-23 of Fig. 1;

Fig. 24 is a perspective view similar to Fig. 21 but showing a. shutter for a fiat fan-shaped beam of light;

Fig. 25 is a horizontal section on the line 2525 of Fig. 24;

Fig. 26 is a top plan view of the light socket and holder;

' Fig. 2'7 is a vertical central section on the line 2'7-2'7 of Fig. 26;

Fig. 28 is a perspective view of a holder for two condensing lenses;

Fig. 29 is a sectional view on the line 29-29 of Fig. 28;

Fig. 30 is a detail vertical sectional view on the line 3030 of Fig. 29;

Fig. 31 is a front elevation of an alternate reflector and holder;

Fig. 32 is a side elevation of the reflector and holder shown in Fig. 31; l Fig. 33 is a fragmentary side elevation of the machine showing a deflecting mirror for deflecting a beam or beams of light above or below the machine;

Fig. 34 is a perspective view of a deflecting mirror supported on its transverse or shorter axis;

Fig. 35 is a view similar to Fig. 34 but showing the mirror supported on its longitudinalor longer axis;

Fig. 36 is a fragmentary detail sectional view on the line 36-36 of Fig. 4 and particularly showing the latch for the color disk;

Fig. 3'7 is a fragmentary vertical view of the machine similar to Fig. 5 and particularly illustrating the means for producing two deflected beams of light;

Fig. 38 is a diagrammatic view similar to Fig. 3'7 but showing a deflected beam and a distant refiected beam both directly upwardly;

Fig. 39 is a diagrammatic view similar to Fig. 3'7 and particularly illustrating the means for producing a direct or horizontal beam and a vertically directed beam;

Fig. 40 is a diagrammatic view similar to Fig. 3'7 and particularly the production of a direct horizontal beam and two vertically directed deflected beams;

Fig. 41 is an electric circuit diagram;

Fig. 42 is a light beam diagram of objective projection;

Fig. 43 is a light beam diagram including the special lens for producing a pencil beam of light;

Fig. 44 is a light beam diagram showing the eflect produced with the rectangular shaped attachment;

Fig. 45 is a light beam diagram showing the effect of the fan-shaped attachment;

Fig. 46 is a light beam diagram illustrating the means which I employ for changing the diameter of the light beam from a straight beam to a wide angle flood light beam;

Fig. 4'7 is a front elevation of the filter disk;

Fig. 48 is a rear view of the filter disk partly broken away;

Fig. 49 is a fragmentary section on the line 4949 of Fig. 47;

Fig. 50 is a fragmentary central section on the line 50--50 of Fig. 4'7; and

Fig. 51 is a fragmentary section on the line 51-51 of Fig. 47.

The machine as shown in the drawings has a rectangular lamp housing 50 mounted upon a base plate 51 which, in turn, is mounted on a tilting bracket base 51', arranged to tilt upon the top 52 ofa base frame 53. The machine is mounted on caster wheels 54 with rubber tires for insulation purposes and secured to the bottom ends of the legs 55 of the base frame so that the whole machine is easily portable.

A rectangular tubular frame 56 projects out forwardly from the base of the lamp housing and protects and supports the various light controlling devices whichI arrange in front of the lamp housing. The frame 56 consists of tubular sides, preferably in the form of tubular members 5'7 secured at their rear ends to the housing base 51 and rigidly joined at their forward ends by a cross bar 58. The cross bar 58 forms a support for the outer ends of a pair of guides 59 arranged within the frame 56 and upon which various light control devices are mounted to move back and forth. The rear ends of the guide rods 59 are rigidly mounted on the base 51 of the housing 50.

The lamp housing is a rectangular box-like structure. It has a vertically arranged control handle 60 of insulation material projecting out from its rear side. On one-side, preferably the right hand side, looking forward, the housing has a large door 61 which swings out on vertical hinges to give access to the housing. The housing is closed at its bottom by a fioor 62, Fig. 5, provided with a large rectangular opening 63 for ventilation purposes. The opening 63 is protected by a guard plate 64 spaced below the bottom 62 and secured by spacer bolts 65. The housing proper is secured rigidly to the base plate 51 and spaced above same by spacer members or legs 66 which are rigidly secured at their upper ends to the floor 62 and removably secured to the base plate 51 by studs 68 and thumb screws 69.

The housing with the base plate 51 is rotatably mounted on the top of the tilting bracket base 51' by a central vertical pivot bolt '70 which extends centrally through a top plate '70 on the tilting base 52. To make this pivot '70 rigid, a rigid central bracket '71 is provided, secured to the underside of the top '70 and through which the pivot bolt extends. The bolt '70 has a head '72 at its upper end in contact with the base 51 and is secured in place by a nut 73 in its lower end which contacts with the bracket' '71. Between the base plate 51 and the base top '70 is provided a circular oil plate '74 loosely mounted on the pivot bolt '70 and which permits the housing to rotate freely. The base plate 51 is provided with oil holes '75 and the plate 74 is provided with a number of oil pockets '75 which are adapted to register with the oil holes '75 and through which they can be fllled. The oil pockets '75 are'arranged in a circle concentric with the pivot bolt '70 and the movement of the base 51 on the plate '74 distributes the oil over the plate and keeps same lubricated.

Within the housing 50 and raised up from the bottom thereof are a pair of horizontal guide rods '76 fixed at their ends' to the front and rear walls of the housing. These guide rods serve as supports for a lamp mounting 7'7 which carries a lamp '78, the source of light for the machine, and a reflector mounting '79 arranged to the rear of the lamp. Both of these supports are mounted for forward and back adjustment on the guide rods '76.

The lamp mounting has a base with horizontal perforations for receiving the guide rods 76 and permitting the forward and backward adjustment of the mounting. Themounting can be rigidly clamped in position by a thumb screw 81. A vertically extending projection 82, rigid with the lamp mounting base, rises from the rear side of same and a vertically adjustable lamp socket clamping ring 83 is adjustably secured to same by means of a screw 84 rigid with the ring 83 and projecting through a vertical slot 84' in the projection 82 and a thumb nut 85. The ring 83 is split and is adapted to be tightly clamped upon a suitable lamp socket 86 by a wing nut and screw 87. This construction allows the socket 86 to be adjusted up and down in the ring 83 and to be adjusted forward and back on the guide rods 76.

The clamping ring 83 also allows the rotational adjustment of the socket so that the operator can position the lamp in the best or a desired position relative to the other light beam control devices, or in regard to the filament.

The vertical projection 82 has forwardly projecting flanges 88 at its sides for guiding the clamp ring 83 as it moves up and down and at the upper end of the bracket these curve outwardly, as shown at 89, Fig. 13, permitting the sidewise tipping of the lamp '78 to adjust it sidewise in relation to the light lenses to be described.

The reflector mounting 79 likewise has a base 90 perforated at its sides to receive the guide rods 76 and adapted to be clamped rigidly in place by a thumb screw 91.

A tubular guide standard 92 projects up from the base 90 and is secured rigidly to the base by nuts 93. This standard is adapted to receive one end 94 of an L-shaped support member 95 which, besides being vertically adjustable in the guide tube 92, can also be rotated in same to adjust the lens holders at desired angles, and is adapted to be rigidly clamped in place by a thumb screw 96 projecting through the wall of the tube. The other end 97 of the angle support member 95 extends horizontally and is adapted to adjustably support a reflector holder 98.

The reflector holder 98 consists of a segmental metal case open at its top and front and formed to receive a concave reflector element 99. The holder 98 has a bracket 100 rigidly secured on its rear side. This bracket is perforated horizontally to receive the horizontal end 97 of the support member 95 and is adapted to be rigidly held in place thereon by the thumb screw 101.-

The bracket 100 is rotatable on the bracket rod 95 to tip the reflector up or down.

The reflector 99 is preferably made of glass and is dished, as shown. It is advisable that the reflector be held in place without any undue pressure or strain and free to expand or contract due to changes of temperature. For this purpose, the holder 98, as best shown in Figs. 15 and 16, has thin yielding sides 102 which are grooved, as shown, at 103 to receive the beveled edge 104 of the reflector 99. The lower end 105 of the holder 98 is circular in form and the reflector flts freely in same. Betweenthe back of the reflector and the back 106 of the holder, asbestos paper is arranged both to serve as a cushion and to prevent quick or sudden changes of temperature of the reflector. The lower portion of the holder 98 is provided with a number of ventilation holes 107 through which air can rise between the holder and the lens.

The top of the lamp housing 50 has a large central opening 108 for ventilation purposes and a fixed cover or top 109 is provided, having considerable depth and spanning over the upper end of thehousing. This cover or top is secured to the housing by spacer bolts 110 and a ventilating space 111 is provided between the skirt of the cover and the top of the housing. The upper end of the cover has an escape opening 112 controlled by a hinged cover 113 adapted to be opened more or less to control the ventilation of the housing. Below the top opening 112, there is a horizontal guard plate 114 bent up at two opposite sides and secured to the top 109 of the lamp housing, as shown, at 115 and ventilating openings 116 are left at each end of the plate 114. For holding the cover 113, a U-shaped wire loop 113' is hinged to the under side of the cover and is arranged to engage a series of stops 114' on said guard plate 114 to hold the cover 113 more or less open to regulate the ventilation of the lamp housing.

The front wall 11'? of the lamp housing is provided with a large opening 118 and a guide flange 119 is arranged at the top, bottom and'left side of the opening spaced out from the outer surface 01' the housing to form guide slots 120 to receive the edges 121 of sheet metal lens holders 122, see Fig. 7. These holders are all of the same overall dimensions and are interchangeably received in the guide slots 120. They each have one edge portion turned up at a right angle to form a flange 1-23, and a handle 124 is secured to this turned up flange. The holder has a forwardly extending central tubular extension 125 in line with the normal positions of the lamp and reflector and the lens 126, as shown in dotted lines, Fig. 4, is adapted to be placed in same from the front and is adapted to be held securely in place by means of a split spring ring 126' in the usual manner, a circumferential g:oove being provided to receive and retain the spring ring in place. The lens holders slide in freely horizontally and as the machine is usually constructed, is about shoulder high and, consequently, one lens can be quickly and easily changed for another of a different kind or light producing effect whenever it is desired to make such a change by merely pulling one out and sliding the other in.

The inner surfaces of the two side walls of the housing and also the rear wall are all covered with good light reflecting material, such as highly polished metal. This is especially shown in Fig. 4 at 127 on one side wall, 128 on the rear wall, and 129 on the other side wall. These several portions are preferably one continuous sheet, and are formed at the corners on a relatively large radius, as shown at 130, such construction serving best to conserve and reflect the light from these walls.

A sheet of asbestos 127 is arranged back of the reflecting metal on the inner walls of the housing to protect the walls of the housing against becoming excessively hot.

The inner surface of the door 61 is also provided with a light reflecting inner surface by means of a metal plate 131 having a highly polished light reflecting inner surface. Preferably, this plate 131 is curved inwardly, toward its rear edge, as shown at 131, to best reflect light toward the front of the housing. The door 61 is mounted to swing out on hinges 132 at the forward vertical edge of the door and is adapted to be held shut by a suitable latch 133 at its rear edge and prothe door have rows of small ventilating openings 61 near their upper and lower ends to let air circulate through the hollow door.

The lamp housing and its connected parts, besides being mounted to swing around in a horizontal plane on a vertical pivot, is also mounted to be tipped up and down to direct beams of light at an angle either above or below the horizontal.

As shown generally in Figs. 1 and 2, and more specifically in Fig. 23, this mounting consists of a horizontal hinge or pivot shaft 135, mounted for rotation in bearings 136, secured at the sides of the top 52 of the base frame 53. This shaft extends horizontally across the top 52 from side to side, and the tilting base 51 has dependent side plates 137 which have openings at their lower ends for receiving the shaft 135.

One of these plates 137 has a nut 138 secured to it in line with the shaft opening and the end 139 of the shaft is threaded to fit same. The shaft 135 is adapted to be locked to the tilting base by means of said nut 138 and a lock nut 140 on the threaded end of the shaft. The opposite end of the shaft 135, which projects out at the side near the door 61, has a hand wheel 141 secured rigidly to the shaft and by which the shaft can be rotated to swing the lamp housing and frame 56 with light control attachments up and down. In Fig. 1, the parts are shown in level or horizontal position in full lines and in uptilted position in dotted lines. The bearings 136 are formed in and on the downturned ends or flanges 142 of the top plate 52 of the frame 53 and these flanges are rigidly spaced or held apart by means of a tubular spacer 143 which is rigidly connected at its ends to said flanges and within which the shaft 135 is enclosed.

The tilting base, being rigidly mounted on the shaft 135, is easily tilted up and down by means of the hand wheel 141. Furthermore, the plates 137 of the tilting base, which are mounted on the shaft, are frictionally engaged and, while the housing can be easily tilted or turned, it is held in its tilted position by such frictional engagement.

In Figs. 17 and 18 I have illustrated an alternate means for mounting the lamp housing for tilting and turning. This means consists of a fixed segmental worm gear 144 mounted on a sub-base 145 and which in turn is mounted on the top 52 of the machine frame to be swung around horizontally on a center pivot bolt 146. A spacer oil-plate 147 is interposed between the subbase 145 and the top 52 upon which the subbase is easily rotatable.

The base 51 of the lamp housing is mounted on the sub-base 145, as in the form already described, by means of the side plates 137 of the housing sub-base. In this form, the side plates 137 are pivotally connected to the sub-base by horizontal pivot bolts 148 which project through the lower ends of said plates and through upturned flanges 149 at the transverse side edges of the sub-base 145.

For controlling the position of the lamp housing and its attached parts in regard to tilting, I provide a worm 150 on a shaft 151 mounted in bearings 152 fixed on the inner face of one of the plates 137 and meshing with the worm wheel 144. The shaft 150 projects out to the rear and is provided with a hand wheel 153, fixed on its rear end for rotating same. As in the other instance, the base 51 carries the frame 56 and guide rods 59.

In each form, the lamp housing proper is readi1 removable from the machine for independent use, if desired. For this purpose, the housing proper is provided with the Z-shaped short legs 66, see Figs. 1, and 17, one at each corner. The lower ends of these legs project outwardly and form flat feet 154 at the front corners and 155 at the rear corners. Sockets 156 are provided on the bottom plate 51 to receive the forward feet from the rear and the rear feet 155 are pierced to receive the studs 68 to accurately dowel the lamp housing on the plate 51. In Figs. 17 and 18 the rear feet 155 are provided with fixed hubs 156' which are provided with threaded openings for receiving the set screws 69 for retaining the housing in position on the plate 51.

In addition to the lens holder 122, Fig. 7, and its lens, I also provide a holder for a pair of condensing lenses, see Figs. 28 to 30, inclusive, and other lens holders interchangeable with these holders may be provided.

As in the former instance, the lenses are mounted in a holder secured to a rectangular plate 160, similar to the holder plate 122, and adapted to be substituted for same. In this instance, the holder consists of a cylindrical shell 161, mounted centrally on the plate 160 and within which one of the lenses 162 is arranged in contact with the plate 160. A split spring spacer ring 163' fits within the tubular shell 161 and the other lens '164 sets against its outer end. The parts are held together by an outer shell or ring 165, which slides over the shell 161 and has an internal circumferential flange 166 to hold the lens 165 in place. The outer ring 165 is split and is clamped tightly in position by a pair of ears 167 and a clamping bolt 168. All of these shells or rings are provided with ventilating openings 169 in the inner spacer ring 170 in the tubular shell and 171 in the outer clamping ring, and by adjusting the outer ring circumferentially, the amount of ventilation can be regulated. This is quite important in outdoor work, to prevent the cracking of the lenses by sudden changes of temperature.

Upon the guide rods 59 and normally in line with the beam projected through the lenses mounted on the front of the lamp housing, is a slide holder 172 and a front objective lens holder The slide holder is detailed in Figs. 19 and 20 and the front objective lens holder in Fig. 11.

The slide holder comprises a sheet metal standard 174 secured to and supported by a base 175. The base 175 is slidingly mounted on the guide rods 59. The standard 174 is mounted so that it can be swung down out of the way at times, as shown in dotted lines, Fig. 1.

For this purpose, the forward edge 176 of the lower end of the standard 174 is hinged to the base, and the rear edge 177 is adapted to be releasably locked to the base by means of a pivotally mounted locking bolt 178, the standard 174 being provided with a slot at the rear edge of its lower end to permit the slide holder to be easily and quickly locked in position, or released.

The slide holder has a guide way 179 in its upper end adapted to receive a slide frame 180. The guide way comprises a lower fixed grooved rail 181 and an upper adjustable grooved rail 182 which is adjustably held in position by thumb screws 183. The slide holder 172 has an opening 184 in its rear wall, protected at its lower side by a rearwardly projecting flange 185 and a similar opening 186 at its forward side, defined by a forwardly extending tubular projection 187.

- receive slides which, by moving the frame transversely, are alternately brought into the center position. "This attachment is particularly useful in throwing messages or advertisements upon suitable objectives, such as walls, buildings, clouds, etc. The frame 180 has stops 189 and 190 at each end for limiting the transverse movement of the frame and for setting it so that the slide exhibited shall becentral in the relation to the openings 184 and 185.

Likewise, the front lens support 173, see Figs. 1 and 11, is mounted and hinged for tipping down at times, out of the way. Its base 191 is mounted to slide back and forth on the guiderods and it is provided with-a box base or standard 192, pivotally hinged to the base at the forward edge of its lower end, and is adapted to be releasably locked inupright position by a thumb screw 193.

:The lens holder proper 194 supported on the holder is adapted to be adjusted in various directions to assist in controlling the beam of light. This mounting consists of a support rod 195 bent at right angles, one leg adapted to be mounted in a vertically extended tube 196 secured in the top wall of the standard 192 and to be held therein by a set screw 197. The tube 196 extends down in the standard and serves as a guide for the support rod 195. The tube 196 is arranged at one side and the bent 011 end 198 of the support rod extends horizontally and is adapted to be swung around to various positions. The rod 195 itself is adjustable vertically. The bent of! end 198 carries the lens ho'lder proper 194, there being a small standard 199 with a hub 200 at its lower end which fits on the bent off, end 198 of the rod and is adapted to be secured thereon by a set screw 201.

The standard 199 carries an objective lens receiving and holding ring 202. Preferably, the objective lens 203 is smaller in diameter than the condensing lenses 162 and 164 and, in order to conserve the light rays, I provide a funnel-shaped member 204 adapted to be removably mounted on the. lens ring 202 at its smaller end and arranged to project rearwardly and 1 face the condenser lenses. This funnel serves toprevent the escape and loss of the rays at the outer part of the beam and direct them through the objective lens, thus intensifying the beam of light.

When the objective lens is not in use, its standard can be loosened and tipped down out of the way, as shown in Fig. 1 in dotted lines. Also, it will be clear that both the slide holder and the objective lens holder can be readily adjusted from and toward the lamp housing, as may be desired, and that the objective lens can be adjusted up or down or side ways or at desired angles by means of the bent rod standard.

I may at times close in the space between the slide holder and the objeotivelens by means of a guard tube 205, Fig. 6, this tube fitting at its rear end in the nozzle 187 of the slide holder and at its forward end within the large end ofthe funnel member 204, as indicated in dotted lines, Fig. 1. The tube 205 has a more important use in connection with directing certain kinds of beams of light. In thisconnection, the tube 205, as indicated in Figs. 22 and 23, provides a mounting upon which devices for producing desired kinds of beams can be held.

In Figs. 21 and 22, there is illustrated a light control device 208 for producing a thin narrow flat beam of light, indicated by the dotted lines 208, Fig. 37, and in Figs. 24 and 25 there is illustrated a device 209 for producing a thin fanshaped beam, as indicated in the dotted lines 207,

Fig. 45.

The device 208, shown in Figs. 21 and 22, consists of a tubular nozzle 209 adapted to fit on one end of the tube 205, the tube 205 for such use being mounted at its rear end on the slide holder nozzle 187 and the lens holder 173 being tipped down out of the way; The nozzle 209 is closed at its front end by a plate 210 which has a central diametrical opening 211 and a flat tube 212 extends forwardly from the plate 210 and is provided at its free end with an external flange 213. The tube 212 is straight and its outer end is adapted to be more or less closed by a slide cover \plate 214.

The cover 214 engages over the end flanges 213 and is adapted to slide up or down to adjust the height of the opening at the outer end of the tube 212 to regulate the vertical thickness of the light beam.

The device 215, shown in Figs. 24, and 25, is quite similar to the device 208 except that the forwardly projecting flat tube 216 instead of being straight, has its side wallsflared outwardly, thus producing a thin flat funnel-shaped nozzle adapted to produce a thin flat fan-shaped beam for spreading the light over a wide area, such as a ball field, golf course, or the like.

In this device, also, a regulating cover plate 217 is provided, slidably mounted on the outer end of the tube 216 to slide vertically and adjust the vertical thickness of the beam of light. In this device, the inner surface of the flat flared tube 216 is covered. by means of a highly polished light reflecting metal to conserve all of the light and cause it to spread out in the fan shape desired.

As the devices 208 and 209 have cylindrical mounting ends, they can be rotated on the tube 205 to any angle to project the fiat beams as desired, either horizontally or vertically or any angle between.

Furthermore, when the tube 205 is used alone, a straight round beam or pencil of light is projected, the beam being the diameter of the tube.

For producing certain desired effects in regard to the color of the light beams, I provide a filter device consisting of a disk 219 mounted on a horizontal axis 220 on the forward side of the lamp housing. The axis is arranged at one side and the disk 219 is provided with a number of circular openings 221, arranged in a circle'and adapted to be positioned successively in front of the front light opening of the housing. In the disk shown, there are four of the openings, one of which does not carry any filter. One of the other openings carries an amber filter for use with fog and smoke, one carries a redfilter for danger signals, and one carries a green or blue filter for other purposes.

The filter 219 disk is rigidly mounted on one end of a shaft 222 which extends through one side of the lamp housing and has a suitable hand wheel 223 secured on its rear end and by which the disk can be turned. For holding the disk with a desired opening 221 centered on the projected light beam, I provide \a spring latch member 224, see Fig. 36, mounted on the front of the lamp housing and having an end 225 adapted to engage in notches 226 in the edge of a ring 227 secured concentrically on the back of the disk 219. The notches are preferably beveled so that the disk can rotate readily clock-wise but will be held against rotation anti-clock-wise. 'The shoulders 228 which prevent the backward rotion the disk in relation to the light beam from the light housing.

Besides the light control devices so far described and which operate principally upon horizontally projected beams, I have provided means for throwing beams upwardly or downwardly out of the direct line and for causing them to sweep the sky practically from horizon to horizon and by rotating the lamp housing, causing the beams to sweep around horizontally.

This means consists primarily of a reflector plate arranged in the path of the projected beam and adapted to be tipped to various angles.

In Figs. 33 to 35, inclusive, and Figs. 37 to 40,.

inclusive, I have illustrated the mirror deflecting means and its uses.

A flat mirror 229 is mounted on a central horizontal axis to swing around vertically in the path of the beam of light 230, Fig. 33, being projected by the machine. The mirror 229 is mounted on horizontal pins 231 which project through hold-. ing bars 232 which project forwardly from the base plate 51. The plate 51 is provided with elongated sockets 233 for receiving the rear ends of the bars 232 and permitting the mirror to be adjusted from and toward the lamp housing and by moving one of the bars further than the other, causing the mirror to be tilted around side wise at an angle. The bars 232 are bent up at their outer ends and are each provided with a series of holes 231' so that the mirror can be adjusted vertically. The mirror 229 is preferably rectangular in shape and has a pair of pins on its long as well as its short diameter so that it may be positioned with its long diameter either vertically or horizontally, as illustrated in Figs. 34 and 35. When the long diameter is horizontal, a pair of bars 232 with suitable offsets 232' are used.

In Fig. 33, the direct vertical deflection of the beam 230 is illustrated, such beam consisting of the direct rays from the lamp and the reflected rays from the reflector lens 99.

In Fig. 37, the production of two deflected rays 235 and 236 are shown, one 235 being the direct rays from the lamp '78, and the other the indirect from the reflector lens 99. For this purpose, the reflector is adjusted out of center and a reflected beam not in direct alignment with the direct ray is produced.

In Fig. 38, the two beams issuing from the lamp housing are at such an angle to each other, due to the relative position of the reflecting lens, that one of the beams 237 does not strike the mirror but passes same, being directed upwardly at an angle and the other beam 238 which strikes the mirror, is deflected upwardly at a different angle.

In Fig. 39, the mirror is shown at such a height and so arranged that the direct beam of light passes over same, as shown at 239, in a horizontal direction and the reflected beam 240 is deflected by the mirror in an upwardly direction.

In Fig. 40, the mirror and the reflecting lens are so arranged that a. direct horizontal beam 241 is produced and two beams 242 and 242' are shown as deflected upwardly by the mirror.

In Figs. 26 and 27, I have shown in detail the socket.86, in which to mount the lamp which is the primary source of light.

The socket is provided with a screw shell connection in which a large base lamp can be mounted and a reducing socket 245 is provided adapted to flt in the connection 244, and having what may be termed a standard size screw shell connection 246 in which the usual sized lamp can be mounted if desired.

In Figs. 31 and 32, I have shown a lens mounting which is alternate to the form shown in Fig. 14. Instead of the segmental holder 98, shown in Fig. 14, the form shown in Figs. 31 and 32 consists of a complete ring 247 in which the reflecting lens flts at its edge and the ring is supported by three arms 248 Joined together at the center at the back of the lens and provided with means. such as a central screw 249 and nut 250 for mounting the holder on a bracket 251, which in a turn is adapted to be secured on the horizontal arm 101 of the angle support rod 94 by a set screw 252. Preferably, the back of the reflecting lens is protected by asbestos to allow for expansion and contraction and ventilation.

On a platform 253, Fig. 3, arranged in the lower part of the main frame 53, is arranged a closed metallic cabinet or box 254 for containing a suitable transformer 255. This box has a rear door 256 and I arrange a pilot lamp 257, preferably a red lamp, so that when the door 256 is open, which it always is when the machine is being operated. a danger lamp will be shown at the rear and this will generally illuminate the rear end of the machine, the operator and the ground. As an additional means of safety, I provide a danger signal to illuminate the ground immediately around and beneath the machine. This consists of a red lamp 258, preferably in a downwardly directed coned reflector 258, Figs. 1 and 2, arranged beneath the box 254 and adapted to illuminate a circle at the base of the machine.

For steadying the machine and for use as a pivot when it is desired to follow an object around with the direct beam by turning the whole machine, I provide a pointed pivot rod 259, Figs. 1 and 2, mounted on the right rear leg 260 of the frame 53 to slide up and down. Normally, the lower end 261 of the rod 259 is raised above the ground and the rod is held in such elevated position by an upper support 262, the upper end 263 of the rod being bent off at a right angle and adapted to rest thereon to serve as a handle for operating the same. By swinging the rod around, it can be freed of the support 262 and pushed down, sliding through the guides 264. to cause its lower pointed end to be pushed into the ground to serve as an anchor and a pivot point and as a ground connection to protect against lightning, etc.

Beneath the box 254, I arrange a reel 265 upon which to wind up a cable 265', by which the machine can be connected in to a suitable source of current. The reel is rigidly mounted on a shaft 266 which is provided with a hand wheel 266' at one end and preferably for quick operation, the wheel has a crank handle 267.

The cable 265 leads into a suitable switch box 268 mounted on the side of the frame 53 and from the switch box, a connection 255' leads to the transformer 255.

From the transformer circuit wires 270 lead to the lamp housing and the pilot lamp 257 and the ground lamp 258' are cut in on the circuit to be illuminated when the machine is in operation.

In Fig. 41, I have illustrated the wiring or circuit diagram. In the switch box 268, I providea single throw switch 268' adapted to open and close the circuit of the lamp '78 for signalling purposes. I can also provide a double throw switch 271 on the frame 53 and connected in as shown in Fig.

41 so that the lamp 78 can be connected either direct to the supply when it is of low voltage or to the transformer when the ,supply is of high voltage.

In addition to the vertical fixed handle 60 at the rear of the lamp housing, I provide another handle 272 so that the strains of manipulation will be distributed. This second handle projects out horizontally from the left hand side of the lamp housing and the operator can easily manipulate the machine to direct the beams as desired. The lamp housing is relatively light and by means of the two handles 60 and 272, the operator can either rotate the machine or lift the housing oif and direct it entirely by hand when it is desired to follow an erratically moving object, such as a dodging plane. To prevent any undue pressure applied to the outer end of the frame 56 tipping the upper part of the machine too far down, I provide a limit chain 273 at the rear of the machine. One end of the chain is attached to the top of the frame 53 and the other end to the rear end of the tilting base 51'.

The diagrammatic Figs. 42 to 46 illustrate some of the effects'which I am able to produce by the use of the direct beam.

Fig. 42 illustrates the use of the reflector lens 99 and the condenser lenses 162 and 164 in throwing an advertisement or device, such as a flag, on a suitable background 274, of course with the use of the objective lens 203.

As shown in Fig. 43, in which I have shown a corrugated lens 127 in place of the condenser lenses, I am enabled to obtain a very intense concentrated beam 275, the center part 276 throwing a small diameter beam 277 and the outer part condensing the outer rays to strike the objective lens 203 and enlarge the parallel ray beam. This produces a very intense pencil beam for use in penetrating fog especially in conjunction with the amber filter.

In Fig. 44, I have illustrated the use of the flat beam device 212, shown in Figs. 21 and 22, and in Fig. 45 I have illustrated the effect when the flat fan-shaped device shown in Figs. 24 and 25 is used. It should be understood that with the direct, the reflected and the deflected beams, any of the filters can be used.

In Fig. 46, I have illustrated some of the effects produced by adjustment of the reflector lens 99 from and toward the light source or lamp 78. The production of a wide divergence or wide spread flood light efl'ect 278 when the reflector lens is close to the lamp and a pencil beam 279 when the reflector is moved back away from the lamp.

The lamp 78 in the lamp housing is connected in circuit by the covered flexible circuit wires 270 which enter through insulation tubes281 mounted in the rear wall of the lamp housing, see Fig. 33. These tubes 281 are long enough andproject out far enough so that the wires 270 will not foul with any projections on the rear of the machine as the lamp housing is swung around.

The reinforcing bracket 71 through which the pivot bolt 70 extends has front and rear walls 282 through which the side members of the tubular frame 56 extend. The guide rods 59 also extend through these walls.

The end portions of the bracket 71 are bent downwardly inside of and in contact with the side plates 137 of the tilting base 51, as indicated at 283, Figs. 1, 3, 5 and 23, and are adapted to reinforce and stiffen the side plates 137 and the base 51.

As best shown in Fig. 5, the front and rear edge portions of the top 70' of the tilting base 51' are bent down to form depending flanges or walls 284 at the front and 285 at the rear.

The side parts 57 of the frame 56 and the guide rods 59 pass through these walls and also through the walls 282 of the center bracket 71 and all of these members are rigidly clamped to the rear I wall 285 by suitable clamping nuts.

As best shown in Figs. 47 to 51, inclusive, the construction of the filter disk 219 is quite novel and has many advantageous features.

The disk comprises a large disk 286 of light weight sheet material and which is provided with the openings 221 in the form illustrated. The disk has four of these openings, oneof which is empty.

The fllter sheets 287 which fill the other three openings are of different characters as has been explained. Each is circular in form and has a light weight protecting rim formed of two flat rings 288 which, as best shown in Fig. 51, enclose the edge of the disk and project beyond same forming a yielding mounting for the disk. The rings 288 are clamped between the main disk 286 and a flat clamping member 289 which is secured to the back of the maindisk 286 by clamping bolts 290. These members 290 are readily removable to change the fllter disks or renew them as may be necessary. This method of mounting the filter disks allows for changes in temperature without putting strains on the disks and the yielding character of the main fllter disk and the mountings prevent wind pressure from fracturing the filter sheets which are usually made of glass. The radial edges 291 of the flat clamping members are folded back so as to make these parts double thickness to strengthen them. The main disk 286 is formed to provide slightly projecting rounded ridges 292 for slightly stiffening the main filter disk 286.

As many modifications of the invention will readily suggest themselves to one skilled in the art, I do not limit or confine the invention to the specific details of construction or combinations of parts herein shown and described.

I claim:

1. In a light beam machine arranged and adapted to project a plurality of beams of light from a single primary source, a source of light such as an electric lamp, a condensing lens through which the direct rays from the lamp-are projected as a beam, and a reflecting lens arranged opposite to the condensing lens and adjustable to project a reflected beam through the condensing lens in parallelism with the first beam or at an anglethereto.

2. The invention as defined in claim 1, and a beam reflecting means adjustable into and out of the path of one or the other or both beams as for the purpose specified.

3. The invention as defined in claim 1, and an adjustable flat reflector beyond the condensing lens adapted to be arranged in the path of either the direct or the indirect beam for changing their directions of projection.

4. The invention as defined in claim 1, and a flat reflector adapted to be arranged in the path of the indirect beam to change .its direction of projection and partly in the path of the direct beam for dividing said beam and changing the direction of projection of the intercepted part thereof.

5. In a machine of the kind described, means for projecting a beam of light, means for placing filter sheets in the path of the beam and compris- 

